<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
div{width: 300px;height: 300px;border: 1px red solid;color: red;font-size: 30px;}
p{border: inherit;}    /* 可以设置继承属性继承div边框属性 */

    </style>
</head>
<body>
   <div>
    <p>这是一个段落 </p>
   </div>
</body>
</html>